Malvern Instruments Spraytec, User Manual

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Trigger Parameters
Manual No parameters
Transmission drops to level Transmission %
Scattering increases to level on
detector Scattering level, detector number
External trigger Slope, impedance
.
Specify these as described in the appropriate description above.
.
Under Data collection specify any advance or delay on the trigger.
Alarms
The system can be set up to warn if the particle size cannot be measured
accurately, for any one of a number of reasons. Alarm thresholds are stored as part
of an SOP. An alarm is automatically produced if this threshold is passed.
The messages that may appear are described in Chapter 8.
There are two alarm levels:
.
Warning – if this occurs the measurement data continues to be analysed. A
warning message, denoted by an exclamation mark ( ! ), is displayed at the
bottom of the Measurement parameters record view.
.
Error – if this occurs the measurement data are not analysed and red bars
are displayed in place of the expected results in the Size History view.
Messages are also displayed at the bottom of the Measurement
parameters window (where they are denoted by three exclamation marks)
and the Message bar.
The alarm settings provide a one-off check that the measured background is in
range. Select the
Warn if background changes during measurement option
to monitor for changes in the background during the measurement.
There are two types of alarm, Background alarms and Scattering alarms.
C H A P T E R 1 0
S p r a y t e c
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